#include<stdio.h>
#include<unistd.h>
#include<iostream>
int main()
{
  pid_t id = fork();
  if(id == 0)
  {
      execl("/bin/ls","ls","-a","-l",nullptr);
  }
  else if(id > 0)
  {
    while(1)
    {
       printf("!!!!!!!!!!!!!!!!!!!!!\n");
       sleep(1);
    }
  }
  return 0;
}
